Is there and efficient method to get UserProfile from email in SharePoint 2010?

Question

I need to find user-profile using the active directory email account.

Note: its not the 'work-email' but the email in AD.

Answer 1

SPUtility.ResolvePrincipal can do this - but I can't guarantee that it'll be fast.

It should be something like:

SPPrincipcalInfo user = SPUtility.ResolvePrincipal( webApp, null, "email", SPPrincipalType.User, SPPrincipalSource.Windows, true);
UserProfileManager profileManager = new UserProfileManager(serviceContext);
if (profileManager.UserExists(user.LoginName))
{
    UserProfile userProfile = profileManager.GetUserProfile(user.LoginName);
}

In this "email" would be your email string. It definitely works, but I have has some issues with speed. It's worth testing.